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Source: — Data Sufficiency |
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by this_time_i_will » Thu Sep 23, 2010 9:22 am
IMO stmt I is sufficeint, but stmt II is not.
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by goyalsau » Thu Sep 23, 2010 9:54 am
Why NOT C. Can you please explain.
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by this_time_i_will » Thu Sep 23, 2010 10:06 am
goyalsau wrote:Why NOT C. Can you please explain.
SInce, u selected C, i assume you already know that B is not sufficient.

HOwever A is sufficient,
Basically, we are mixing two solutions of 0% (only water) and 35% to get 10%.
Let's assume that amount of water(0% solution) to be added is x.Also, A gives amount of 35% solution to be 50 gm.
Applying basic principle of alligation,
x/(35-10) = 50/(10-0)..this will give x.

i hope it is clear mate. :)
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by goyalsau » Thu Sep 23, 2010 10:16 am
this_time_i_will wrote:
goyalsau wrote:Why NOT C. Can you please explain.
SInce, u selected C, i assume you already know that B is not sufficient.

HOwever A is sufficient,
Basically, we are mixing two solutions of 0% (only water) and 35% to get 10%.
Let's assume that amount of water(0% solution) to be added is x.Also, A gives amount of 35% solution to be 50 gm.
Applying basic principle of alligation,
x/(35-10) = 50/(10-0)..this will give x.

i hope it is clear mate. :)
Even i did this way first, but then i thought that how can we assume that in 35% acid solution remaining water is 65%.
Let it be the case when in the solution acid is 35% and other acid something different from water is 20% ( any acid other than this 35% ) and what we left is water than....

That's why i choose C.
Hope you understand my point.
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by this_time_i_will » Thu Sep 23, 2010 5:54 pm
goyalsau wrote: Even i did this way first, but then i thought that how can we assume that in 35% acid solution remaining water is 65%.
Let it be the case when in the solution acid is 35% and other acid something different from water is 20% ( any acid other than this 35% ) and what we left is water than....

That's why i choose C.
Hope you understand my point.
Yes, what are you saying is correct. That may be the case. But how is that going to affect the concentration eith respect to acid? as far as acid concentration is concerned, both water and that other liquid will not contribute towards increasing the concentration of acid. so the concentration of water and that other liquid would be taken as zero.
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